Gargan
From Tardis Wiki, the free Doctor Who reference
The Gargan was a large, reptilian predator with massive claws. (AUDIO: The Forever Trap) They would mark their territory with rocks; any creature that passed the rocks would be relentlessly hunted. (AUDIO: The Paradise of Death)
The Tenth Doctor speculated that Mr. Gnur was a Gargan. (AUDIO: The Forever Trap)
